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#1
08-12-2005, 10:22 PM
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Downpipe Question
What is the inlet diameter of a stock down pipe? I have been trying not to ask this ignorant ass question but I cant find it anywhere! My friend wants a new down pipe and another of my friends is going to weld us a catback, we just need to know if we should get a new downpipe with a 2.5" inlet or a 3" inlet (we are going for a full 3" exhaust). Thanks!
__________________
 Build on hold until I get a good paying job, either in school or once I get out. At that time a full tear down and complete rebuild should be in order. The Purple People Eater will ride again... January 2011 can't come soon enough. 
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#2
08-12-2005, 10:37 PM
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Re: Downpipe Question
2.25" mabey, just do a full 3" dont bother with 2.5"
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Chris Clark www.Talon007.com 1990 Eagle Talon TSi AWD - In Progress 1993 Eagle Talon TSi AWD - Parts Car 1990 Eagle Talon ESi - Sold 1-800-VFAQ - Bookmark it, read it, use it __________________
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#3
08-12-2005, 10:41 PM
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Re: Downpipe Question
While you are there port your o2 housing
 As big as you can make it!
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1990 Mitsubishi Eclipse GSX 1995 Mitsubishi Eclipse GS-T (SOLD) 2002 VW Jetta 1.8T
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#4
08-12-2005, 10:50 PM
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Just measured mine, which should be close to yours...and my inlet was 2.229" and the outlet was 2.54" I just bought a downpipe also(comes monday
 ) hope it gives improvement 
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 05 Srt4 Agp 3147 w/supporting mods  97 Mx-5 T28, hks man, ebay int/pipes, rfl bov, xtd 6 puck, 3" magnaflow, msd timing box,
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#5
08-12-2005, 10:58 PM
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Ok, so would a down pipe with a 3" inlet bolt up to the stock o2 housing?
__________________
Build on hold until I get a good paying job, either in school or once I get out. At that time a full tear down and complete rebuild should be in order. The Purple People Eater will ride again... January 2011 can't come soon enough.
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#6
08-12-2005, 11:10 PM
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Re: Downpipe Question
I have a 2.5 inlet, 3" outlet and it fit to the o2 housing perfect. I assume your gonna have to port ur o2 housing to make it fit, or buy an aftermarket one
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95 Eclipse GS-T 6 bolt built block - shooting for 450 hp..very doable Currently: A lot, check progression thread - updated 3/27/10 Estimated completion date: Soon lol
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#7
08-12-2005, 11:12 PM
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Ya it will bolt right up but without a ported o2 housing you most likely wont end up with a huge power gain.
__________________
05 Srt4 Agp 3147 w/supporting mods 97 Mx-5 T28, hks man, ebay int/pipes, rfl bov, xtd 6 puck, 3" magnaflow, msd timing box,
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#8
08-12-2005, 11:31 PM
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The stock exhaust rusted through and was dragging all over the ground so we decided to buy a new down pipe and have our friend weld the rest, we just needed to know if we needed to get a 2.5" inlet or if a 3" inlet one would work... we arent sure on future plans so if a 3" would bolt up, we were going to get that just incase. We will probably port the o2 housing and a 2g manifold this winter. Just to clarify... a downpipe with 3" inlet WILL bolt up to a stock o2 housing?
__________________
Build on hold until I get a good paying job, either in school or once I get out. At that time a full tear down and complete rebuild should be in order. The Purple People Eater will ride again... January 2011 can't come soon enough.
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#9
08-12-2005, 11:49 PM
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Yea man everywhere I look they sell 3in DP that bolt up to the stock o2. You should be good. Good luck.
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--the Cruiser-->97 Spyder GST 5sp ---3 inch exhaust, boost/vac gauge, mbc, greddy turbo timer, greddy fmic, greddy type S BOV, 17in wheels --the DD-->99 ACURA 3.2 TL --Sold 92TSi AWD, 6-bolt, auto, evo 3 gt turbo with supporting mods
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#10
08-12-2005, 11:54 PM
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Sweet, thanks guys, I appreciate all the posts in such a short ammount of time.
__________________
Build on hold until I get a good paying job, either in school or once I get out. At that time a full tear down and complete rebuild should be in order. The Purple People Eater will ride again... January 2011 can't come soon enough.
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#11
08-13-2005, 04:23 AM
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Re: Downpipe Question
the stock o2 housing is 2.5''
most DP's have a 2.5'' inlet, then after the flex section [very important part] it is 3''
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#12
08-13-2005, 07:00 PM
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New downpipe on the way... thanks again!
__________________
Build on hold until I get a good paying job, either in school or once I get out. At that time a full tear down and complete rebuild should be in order. The Purple People Eater will ride again... January 2011 can't come soon enough.
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